I have been involved in telecom for 30 years and have to be very aware various laws, ammended petitions and FCC over reach.
CALEA was, in fact, used as the basis for FBI petition to include wireless, VoIP and Internet.
The second the law was passed, several agencies sued in court for expansion and inclusion, as they interpreted and it was granted.
In 1999, the FCC approved many of the FBIs demands, including a proposal to turn cellular and other wireless “PHONES” into tracking devices.
“Stingray” is just one of the many products of this overly broad interpretation but, it wasn’t the basis for my original comment.
At the carrier level.